You know what can be fun if done in moderation? Most things, actually. Among those things, alcohol is probably high on the list for most people. While drinking, it's also fun to be able to quantify how intoxicated you actually are – something a little more than "my face is numb" or "Nah, I'm OK – I've only had 12 shots." That's where this nifty little Bluetooth breathalyzer from BACtrack ($150) comes into play – it can tell you exactly how drunk (or not drunk) you are in about 30 seconds.

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